Effect of Surface Curvature(2) S.J.T.U. Phase Transformation and Applications Page 17/42 u dm,undmn ydA O dm,=-dmy dm dA 山，-n=Ydi If the surface is flat,dA/dm=0 41=4m=4∞ Phase I Ic] Phase IⅡ The chemical potential of a material with an infinite radius of curvature. Surface Distance- y Figure 4.4 Concentration of component C as a function of distance.Surface is assumed to be at location where shaded areas are equal. SJTU Thermodynamics of Materials Spring 2008 X.J.Jin Lecture 20 surfacePhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 20 surface Page 17/42 Effect of Surface Curvature (2) μ + μ IIIIII + γdAdmdm = 0 I = II =− dmdmdm If the surface is flat, dA/dm=0 dm dA III =− γμμ μ = μIII = μ ∞ The chemical potential of a material with an infinite radius of curvature. Phase I Phase II